96571991 has 4 divisors (see below), whose sum is σ = 98013432. Its totient is φ = 95130552.

The previous prime is 96571931. The next prime is 96571997. The reversal of 96571991 is 19917569.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 96571991 - 2¹⁰ = 96570967 is a prime.

It is a super-2 number, since 2×96571991² = 18652298891408162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (96571997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720620 + ... + 720753.

It is an arithmetic number, because the mean of its divisors is an integer number (24503358).

Almost surely, 2^96571991 is an apocalyptic number.

96571991 is a deficient number, since it is larger than the sum of its proper divisors (1441441).

96571991 is a wasteful number, since it uses less digits than its factorization.

96571991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441440.

The product of its digits is 153090, while the sum is 47.

The square root of 96571991 is about 9827.1049144700. The cubic root of 96571991 is about 458.7932944016.

The spelling of 96571991 in words is "ninety-six million, five hundred seventy-one thousand, nine hundred ninety-one".